Just wondering why Neurontin causes weight gain? I take 600 mg 4xday. If anything, I eat less now than before my accident yet I've gained 20+ pounds! I know inactivity is part of that but it doesn't account for all of that weight. I've skimmed some of the threads here and see that a lot of people on Neurontin complain of weight gain. I guess my question is why does neurontin make us fat??! I'm T11/12 btw. Thanks.